package com.demo;

/**
 * Created by zh on 17/1/11.
 */
public class A {
    private String a;

    public A(String a) {
        this.a = a;
        System.out.println("A 构造方法 : a");
    }

    public A(B b) {
        System.out.println("public  A(B b) b="+b);
//        System.out.println("b=" + b);
    }

    public String getA() {
        return a;
    }

}
